There are racial differences in IQ. Fact. Uncomfortable fact, but it's a fact.
This isn't a bad thing, though. This doesn't mean one race is superior to another.
I technically have a much higher IQ than my wife, but she's still the smart one, in my opinion. I've made a lot of poor decisions in my life, but I wouldn't say that about her. She handles the finances and is more responsible with adulting than I am.
I was evaluated when I was 22 by a psychiatrist and told I had a 142 IQ.
People tell me that's high and that it's low-end genius level. But I don't see it. I don't feel like a genius. Like I said, I've made some very dumb decisions in my life. Bad financial decisions, bad career decisions, and bad education decisions.
However, I have always been good at taking tests. Especially tests that contain a good portion of multiple choice questions.
Just because someone is good at taking tests doesn't make them superior at anything but taking tests.
So, I don't put a lot of stock into IQ when it comes to success. It's just a number and isn't a good measure on whether a person is good at life, a good person, or not.